android屏幕取词简单事例1

package libaier.ocr; import java.io.FileInputStream; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.apache.http.util.EncodingUtils; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import android.R.color; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast; public class OCR_TestActivity extends Activity { // 获得用于动态添加TextView的Layout LinearLayout words_layout = null; // 用于添加的TextView TextView words_view[] = null; // 网络取词用到 private String meaning = null; // 网络取词相关 private String url = "http://dict.cn/ws.php"; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); readWords(); } public void readWords() { words_layout = (LinearLayout) findViewById(R.id.words); // 因为只是示例，打开文件方面做的很粗糙，直接现在SD卡根目录下放了一个名为Text.txt的文件，内容为“Libaier is // Tuesday” String str = readFileSdcard("mnt/sdcard/Test.txt"); // 根据空格把这个句子分开，得到每一个单词，以后详细做的时候要考虑标点等多种情况，示例就简 String[] words_str = str.split(" "); words_view = new TextView[words_str.length]; for (int i = 0; i < words_str.length; i++) { // 将每个TextView即每个单词依次添加到layout上，并为每个TextView添加翻译监听，这里并没实现真正“划”词的效果，要实现只需修改translate（）函数即可，关于划词的具体实现会在讨论第二种OCR方法时具体讨论 words_view[i] = new TextView(this); words_view[i].setText(words_str[i]); final String word_totranslate = (String) words_view[i].getText(); words_view[i].setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub translate(word_totranslate); } }); words_layout.addView(words_view[i]); // 在每个单词后添加一个空格只为美观 words_view[i] = new TextView(this); words_view[i].setText(" "); words_layout.addView(words_view[i]); } } // 读取SD卡文件函数 public String readFileSdcard(String fileName) { String res = ""; try { FileInputStream fin = new FileInputStream(fileName); int length = fin.available(); byte[] buffer = new byte[length]; fin.read(buffer); res = EncodingUtils.getString(buffer, "UTF-8"); fin.close(); } catch (Exception e) { e.printStackTrace(); } return res; } // 翻译函数 private void translate(String str) { String explain = getWord(url + "?q=" + str); if (explain.equals("Not Found")) { Toast.makeText(getApplicationContext(), "查无此词", Toast.LENGTH_SHORT) .show(); } else { Toast .makeText(getApplicationContext(), explain, Toast.LENGTH_SHORT).show(); } } // 从网络取词 private String getWord(String urlword) { String wordResult = ""; URL url = null; try { url = new URL(urlword); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); conn.setDoInput(true); conn.setDoOutput(true); conn.setRequestProperty("User-Agent", "Mozilla/4.0" + "(compatible; MSIE 6.0; Windows 2000)"); conn.setRequestProperty("Content-type", "text/xml; charset=UTF-8"); conn.connect(); InputStream XMLBody = conn.getInputStream();// 解析返回的xml wordResult = parseXML(XMLBody); } catch (Exception ex) { Log.i("error", ex + ""); // showDialog("" + ex); } return wordResult; } // 解析xml private String parseXML(InputStream is) { String result = ""; String mean = ""; String example = ""; String e11 = ""; String e21 = ""; // 解析xml,采用Dom解析 Document doc = null; try { DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); Log.i("--", "----------11-"); doc = db.parse(is); Log.i("--", "-----------"); doc.getDocumentElement().normalize(); Log.i("getWord", "===================="); // 首先解析出单词的意思 NodeList nmean = doc.getElementsByTagName("def"); if (nmean.getLength() == 0) {// 如果没有def标签，就认为是找不到该单词 meaning = "Not Found"; } else { for (int i = 0; i < nmean.getLength(); i++) { mean = nmean.item(0).getFirstChild().getNodeValue(); } meaning = mean; } if (meaning.equals("Not Found")) { result = meaning; } // 解析出例句 else { NodeList nexample = doc.getElementsByTagName("sent"); for (int i = 0; i < nexample.getLength(); i++) { example += "\n"; Element el = (Element) nexample.item(i); Node orig = el.getElementsByTagName("orig").item(0); e11 = orig.getFirstChild().getNodeValue(); e11 = e11.substring(0, e11.lastIndexOf("<em>")) + " " + e11.substring(e11.lastIndexOf("<em>") + 4, e11 .lastIndexOf("</em>")) + e11.substring(e11.lastIndexOf("</em>") + 5, e11 .length()); example += e11; Node trans = el.getElementsByTagName("trans").item(0); e21 = trans.getFirstChild().getNodeValue(); example += e21; } // 然后解析出相应的例句 result = mean; } } catch (Exception ex) { // showDialog(ex + "hello"); } return result; } }